[Engine] Added Me getter to IProtocolManager
[Engine] Use IProtocolManager instead of ProtocolManagerBase for hooks
[Frontend-Tests] Track API changes of IProtocolManager
[Engine-IRC] Fixed passing null to MessageHookEnvironment ctor for server messages
[Engine] Added arguments support to HookRunner
[Engine, Frontend] Implemented command hooks support (closes: #126)
[Engine] Use hooks/engine/ directory for hooks running on the engine side